升级android studio后(主要是gradle升级后),butterknife 不再被支持;
现在google主推ViewBinding?
一下就是我用ViewBinding 做的一个小demo,展示ViewBinding 的使用
一、build.gradle配置
? ? ? ? 1、ViewBinding
android {
……
buildFeatures {
viewBinding = true
}
}
? ? ? ? 2、dependencies 相关配置
????????
dependencies {
……
//RecyclerView 列表
implementation 'androidx.recyclerview:recyclerview:1.2.0-beta01'
}
二、界面展示
三、activity代码
? ? ? ? 1、activity_main.xml? 代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/etName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="18sp"
android:hint="名称"/>
<EditText
android:id="@+id/etAge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:inputType="number"
android:textSize="18sp"
android:hint="年龄"/>
<Button
android:id="@+id/btnAdd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="添加"/>
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center|left"
android:paddingLeft="20dp"
android:background="#D9F8F5"
android:textColor="#000000"
android:textSize="18sp"
android:text="数据列表-点击可删除"/>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rvData"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
? ? ? ? 2、MainActivity? 代码
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import android.os.Bundle;
import com.xolo.myobjectbox.databinding.ActivityMainBinding;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
//系统依据 activity_main.xml 自动生成的 ActivityMainBinding 类,通过 ActivityMainBinding 可以获取对应的控件
ActivityMainBinding mainBinding;
private StudentAdapter studentAdapter;
private List<StudentModel> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main); -需要注释掉
//加载界面
mainBinding = ActivityMainBinding.inflate(getLayoutInflater());
setContentView(mainBinding.getRoot());
//添加StudentAdapter适配器
list = new ArrayList<>();
studentAdapter = new StudentAdapter(this, list, o -> {
list.remove((int)o);
studentAdapter.notifyDataSetChanged();
});
mainBinding.rvData.setLayoutManager(new GridLayoutManager(this, 1));
mainBinding.rvData.setNestedScrollingEnabled(true);
mainBinding.rvData.setAdapter(studentAdapter);
//添加点击事件
mainBinding.btnAdd.setOnClickListener(v -> {
String name = mainBinding.etName.getText().toString();
String age = mainBinding.etAge.getText().toString();
list.add(0, new StudentModel(name, age));
studentAdapter.notifyDataSetChanged();
});
}
}
四、adapter代码
? ? ? ? 1、adapter_student.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp"
android:background="#FFFFFF"
android:layout_marginBottom="1dp"
android:id="@+id/llClick">
<TextView
android:id="@+id/tvName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="name:"
android:textColor="#000000"
android:textSize="18sp" />
<TextView
android:id="@+id/tvAge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="age:"
android:textColor="#000000"
android:textSize="18sp" />
</LinearLayout>
? ? ? ? 2、StudentAdapter
import android.annotation.SuppressLint;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.xolo.myobjectbox.databinding.AdapterStudentBinding;
import java.util.List;
public class StudentAdapter extends RecyclerView.Adapter<StudentAdapter.ViewHolder> {
private Context context;
private List<StudentModel> list;
private ClickInterface clickInterface;
public StudentAdapter(Context context, List<StudentModel> list, ClickInterface clickInterface) {
this.context = context;
this.list = list;
this.clickInterface = clickInterface;
}
@NonNull
@Override
public StudentAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//界面设置
AdapterStudentBinding studentBinding = AdapterStudentBinding.inflate(LayoutInflater.from(context), parent, false);
return new ViewHolder(studentBinding);
}
@SuppressLint("SetTextI18n")
@Override
public void onBindViewHolder(@NonNull StudentAdapter.ViewHolder holder, int position) {
holder.studentBinding.tvName.setText("姓名:"+list.get(position).getName());
holder.studentBinding.tvAge.setText("年龄:"+list.get(position).getAge());
holder.studentBinding.llClick.setOnClickListener(v -> clickInterface.ClickOnThe(position));
}
@Override
public int getItemCount() {
return list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
系统依据 activity_main.xml 自动生成的 AdapterStudentBinding 类,通过 ActivityMainBinding 可以获取对应的控件
AdapterStudentBinding studentBinding;
public ViewHolder(@NonNull AdapterStudentBinding itemView) {
super(itemView.getRoot());
studentBinding = itemView;
}
}
}
五、Interface代码
public interface ClickInterface {
void ClickOnThe(Object o);
}
六、Model代码
public class StudentModel {
private String name;
private String age;
public StudentModel() {
}
public StudentModel(String name, String age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
七、代码界面展示
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